by@kurgm
AC
5949ms
import java.util.*
fun main(a:Array<String>){val s=Scanner(System.`in`)
val X=IntArray(12)
print((0..11).sumBy{i->X[i]=s.nextInt()-X[i%3]
i/9*X[i]*(X[(i+1)%3+3]*X[(i+2)%3+6]-X[(i+1)%3+6]*X[(i+2)%3+3])}/6)}09 90 26 70 54 41 06 47 15 29 03 02
5317